A116011 - OEIS

%I #4 May 29 2013 15:42:49

%S 11,106,407,415,457,5049,11473,13477,15356,18428,19427,20669,27973,

%T 39685,40062,45174,58976,60616,66928,93478,105516,108706,113100,

%U 118511,139027,163823,170002,178214,184338,206388,217780,222201

%N n+p(n)+p(p(n)) is a square, where p(n) is the n-th prime.

%e 407+p(407)+p(p(407))=169^2.

%t Select[Range[250000],IntegerQ[Sqrt[#+Prime[#]+Prime[Prime[#]]]]&] (* _Harvey P. Dale_, May 29 2013 *)

%Y Cf. A116010.

%K nonn

%O 1,1

%A _Giovanni Resta_, Feb 13 2006